// 基础工具

exports.uuid = () => {
  const S4 = () => {
    return (((1+Math.random())*0x10000)|0).toString(16).substring(1)
  }
  return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4())
}
